package wrapper;

public class IntegerDemo {
    public static void main(String[] args) {
        int max=Integer.MAX_VALUE;
        int min=Integer.MIN_VALUE;
        System.out.println("int的最大值为："+max+"，最小值为："+min);
        long max1=Long.MAX_VALUE;
        long min1=Long.MIN_VALUE;
        System.out.println("long的最大值为："+max1+"最小值为："+min1);
        String s1="40";
        int age=Integer.parseInt(s1);
        System.out.println(age);
        String s2="123456.123";
        double price=Double.parseDouble(s2);
        System.out.println(price);
        /*Integer i1=Integer.valueOf(120);
        Integer i2=Integer.valueOf(120);
        System.out.println(i1==i2);
        System.out.println(i1.equals(i2));*/
        /*Integer i=Integer.valueOf(5);
        int j=Integer.valueOf(5);
        Integer m=5;
        int n=m;*/

    }
}
